| 基于双POD模型的大跨屋盖多模态随机风致响应研究 |
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| 引用本文： | 潘峰,叶尹,孙炳楠.基于双POD模型的大跨屋盖多模态随机风致响应研究[J].空气动力学学报,2009,27(1). |
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| 作者姓名： | 潘峰 叶尹 孙炳楠 |
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| 作者单位： | 1. 浙江省电力设计院,浙江,杭州,310012
2. 浙江大学,土木工程学系,浙江,杭州,310027;浙江大学宁波理工学院,土木建筑工程分院,浙江,宁波,315100 |
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| 摘 要： | 讨论了具有空间相关三维随机风荷载的数学模型.风荷载的准确模拟是结构进行风致动力响应分析的第一步,POD法提供了一种高效、准确的风荷载模拟方法.本文根据双POD模型和Monte Carlo模拟法,详细研究了空间相关三维风场的数值模拟方法,模拟的风场与实际较为一致.结合随机离散法和多阶模态加速度法的原理,详细推导了大跨屋盖风致响应与风振系数的计算方法.通过大跨屋盖刚性和气弹模型风洞试验,得出高阶振型对大跨屋盖结构的风致响应的贡献不可忽略,并计算了屋盖的风致动力响应时程.研究了大跨屋盖表面荷载风振系数和位移风振系数的分布,结果与有限元分析较为吻合,证实了本文提出的方法是一种高效、准确的大跨屋盖风致响应计算方法.
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| 关 键 词： | 双POD模型 三维风场模拟 大跨屋盖 时程分析 风致响应 风振系数 |
Three-dimensional numerical simulation of spatial-correlated stochastic wind field based on double POD model |
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| PAN Feng,YE Yin,SUN Bin-nan.Three-dimensional numerical simulation of spatial-correlated stochastic wind field based on double POD model[J].Acta Aerodynamica Sinica,2009,27(1). |
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| Authors: | PAN Feng YE Yin SUN Bin-nan |
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| Institution: | 1.Zhejiang Electric Power Design Institute;Hangzhou 310012;China;2.Department of Civil Engineering;Zhejiang University;Hangzhou 310027;3.School of Civil Engineering and architecture;Ningbo Institute of Technology Zhejiang University;Ningbo 315100;China |
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| Abstract: | The mathematical models of spatial-correlated wind velocity stochastic processes have been studied in this paper.The modeling and simulation of the wind field along structures is a fundamental step in the analysis of their wind-induced dynamic response.The proper orthogonal decomposition(POD) technique offers efficient and accurate tool to simulate the fluctuating components of wind fields.Based on double POD model and Monte Carlo framework,a very efficient simulation scheme for turbulence components is pro... |
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| Keywords: | double POD model three-dimension wind field simulation long-span roof time domain analysis wind-induced dynamic response gust factor |
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